Direct debug dialog hangs in OnSize()

When I build pgAdmin from sources on my laptop running Debian, and try
to open the Direct Debug dialog by choosing "Debug" on a function,
pgAdmin hangs, consuming 100% of CPU. The dialog never opens, and I have
no choice but kill pgAdmin forcibly. I only get this problem when I
build pgadmin from sources, the binary version from Debian repository
works fine.

I complained about this same issue years ago, and it was apparently
fixed back then
(http://archives.postgresql.org/pgadmin-hackers/2009-04/msg00017.php)
but looks like the issue has reappeared. Attaching a debugger to the
process when it's hung, I get a stack trace identical to that I posted
back in 2009. It's stuck repeatedly getting the OnSize event, and
resizing the window or some of the controls in response.

I don't understand much about this stuff, but I started comparing the
dlgDirectDbg window with dlgPgpassConfig window, which is very similar
but works. Looks to me there's some useless nested panels in the
dlgDirectDbg dialog, and removing them fixes the issue for me. After
that, the size of the window is wrong, though, so I added some extra
code to recalculate the desired window size after adding the arguments
to the grid in the dialog. I'm not sure what the original problem was or
why this fixes it, but the attached patch fixes it for me.

--
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com